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CSSComputedStyleDeclaration.cpp
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4657 lines (4188 loc) · 211 KB
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/*
* Copyright (C) 2004 Zack Rusin <zack@kde.org>
* Copyright (C) 2004-2021 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
* Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
* Copyright (C) 2011 Sencha, Inc. All rights reserved.
* Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "config.h"
#include "CSSComputedStyleDeclaration.h"
#include "BasicShapeFunctions.h"
#include "CSSBasicShapes.h"
#include "CSSBorderImage.h"
#include "CSSBorderImageSliceValue.h"
#include "CSSFontFeatureValue.h"
#include "CSSFontStyleValue.h"
#include "CSSFontValue.h"
#include "CSSFontVariationValue.h"
#include "CSSFunctionValue.h"
#include "CSSGridAutoRepeatValue.h"
#include "CSSGridIntegerRepeatValue.h"
#include "CSSLineBoxContainValue.h"
#include "CSSPrimitiveValue.h"
#include "CSSPrimitiveValueMappings.h"
#include "CSSPropertyAnimation.h"
#include "CSSPropertyNames.h"
#include "CSSPropertyParser.h"
#include "CSSRayValue.h"
#include "CSSReflectValue.h"
#include "CSSSelector.h"
#include "CSSShadowValue.h"
#include "CSSTimingFunctionValue.h"
#include "CSSValueList.h"
#include "CSSValuePool.h"
#include "ComposedTreeAncestorIterator.h"
#include "ContentData.h"
#include "CursorList.h"
#include "DeprecatedCSSOMValue.h"
#include "Document.h"
#include "ElementRareData.h"
#include "FontCascade.h"
#include "FontSelectionValueInlines.h"
#include "FontTaggedSettings.h"
#include "NodeRenderStyle.h"
#include "Pair.h"
#include "QuotesData.h"
#include "Rect.h"
#include "RenderBlock.h"
#include "RenderBox.h"
#include "RenderInline.h"
#include "RenderStyle.h"
#include "SVGElement.h"
#include "SVGRenderSupport.h"
#include "Settings.h"
#include "ShapeValue.h"
#include "StyleProperties.h"
#include "StylePropertyShorthand.h"
#include "StylePropertyShorthandFunctions.h"
#include "StyleResolver.h"
#include "StyleScope.h"
#include "StyleScrollSnapPoints.h"
#include "Styleable.h"
#include "TouchAction.h"
#include "WebKitFontFamilyNames.h"
#include "WillChangeData.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/text/StringBuilder.h>
#include "CSSGridLineNamesValue.h"
#include "CSSGridTemplateAreasValue.h"
#include "RenderGrid.h"
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(CSSComputedStyleDeclaration);
static CSSValueID valueForRepeatRule(NinePieceImageRule rule)
{
switch (rule) {
case NinePieceImageRule::Repeat:
return CSSValueRepeat;
case NinePieceImageRule::Round:
return CSSValueRound;
case NinePieceImageRule::Space:
return CSSValueSpace;
default:
return CSSValueStretch;
}
}
static Ref<CSSPrimitiveValue> valueForImageSliceSide(const Length& length)
{
// These values can be percentages, numbers, or while an animation of mixed types is in progress,
// a calculation that combines a percentage and a number.
if (length.isPercent())
return CSSValuePool::singleton().createValue(length.percent(), CSSUnitType::CSS_PERCENTAGE);
if (length.isAuto() || length.isFixed())
return CSSValuePool::singleton().createValue(length.value(), CSSUnitType::CSS_NUMBER);
// Calculating the actual length currently in use would require most of the code from RenderBoxModelObject::paintNinePieceImage.
// And even if we could do that, it's not clear if that's exactly what we'd want during animation.
// FIXME: For now, just return 0.
ASSERT(length.isCalculated());
return CSSValuePool::singleton().createValue(0, CSSUnitType::CSS_NUMBER);
}
static Ref<CSSBorderImageSliceValue> valueForNinePieceImageSlice(const NinePieceImage& image)
{
auto& slices = image.imageSlices();
RefPtr<CSSPrimitiveValue> top = valueForImageSliceSide(slices.top());
RefPtr<CSSPrimitiveValue> right;
RefPtr<CSSPrimitiveValue> bottom;
RefPtr<CSSPrimitiveValue> left;
if (slices.right() == slices.top() && slices.bottom() == slices.top() && slices.left() == slices.top()) {
right = top;
bottom = top;
left = top;
} else {
right = valueForImageSliceSide(slices.right());
if (slices.bottom() == slices.top() && slices.right() == slices.left()) {
bottom = top;
left = right;
} else {
bottom = valueForImageSliceSide(slices.bottom());
if (slices.left() == slices.right())
left = right;
else
left = valueForImageSliceSide(slices.left());
}
}
auto quad = Quad::create();
quad->setTop(WTFMove(top));
quad->setRight(WTFMove(right));
quad->setBottom(WTFMove(bottom));
quad->setLeft(WTFMove(left));
return CSSBorderImageSliceValue::create(CSSValuePool::singleton().createValue(WTFMove(quad)), image.fill());
}
static Ref<CSSPrimitiveValue> valueForNinePieceImageQuad(const LengthBox& box, const RenderStyle& style)
{
RefPtr<CSSPrimitiveValue> top;
RefPtr<CSSPrimitiveValue> right;
RefPtr<CSSPrimitiveValue> bottom;
RefPtr<CSSPrimitiveValue> left;
auto& cssValuePool = CSSValuePool::singleton();
if (box.top().isRelative())
top = cssValuePool.createValue(box.top().value(), CSSUnitType::CSS_NUMBER);
else
top = cssValuePool.createValue(box.top(), style);
if (box.right() == box.top() && box.bottom() == box.top() && box.left() == box.top()) {
right = top;
bottom = top;
left = top;
} else {
if (box.right().isRelative())
right = cssValuePool.createValue(box.right().value(), CSSUnitType::CSS_NUMBER);
else
right = cssValuePool.createValue(box.right(), style);
if (box.bottom() == box.top() && box.right() == box.left()) {
bottom = top;
left = right;
} else {
if (box.bottom().isRelative())
bottom = cssValuePool.createValue(box.bottom().value(), CSSUnitType::CSS_NUMBER);
else
bottom = cssValuePool.createValue(box.bottom(), style);
if (box.left() == box.right())
left = right;
else {
if (box.left().isRelative())
left = cssValuePool.createValue(box.left().value(), CSSUnitType::CSS_NUMBER);
else
left = cssValuePool.createValue(box.left(), style);
}
}
}
auto quad = Quad::create();
quad->setTop(WTFMove(top));
quad->setRight(WTFMove(right));
quad->setBottom(WTFMove(bottom));
quad->setLeft(WTFMove(left));
return cssValuePool.createValue(WTFMove(quad));
}
static Ref<CSSValue> valueForNinePieceImageRepeat(const NinePieceImage& image)
{
auto& cssValuePool = CSSValuePool::singleton();
auto horizontalRepeat = cssValuePool.createIdentifierValue(valueForRepeatRule(image.horizontalRule()));
RefPtr<CSSPrimitiveValue> verticalRepeat;
if (image.horizontalRule() == image.verticalRule())
verticalRepeat = horizontalRepeat.copyRef();
else
verticalRepeat = cssValuePool.createIdentifierValue(valueForRepeatRule(image.verticalRule()));
return cssValuePool.createValue(Pair::create(WTFMove(horizontalRepeat), WTFMove(verticalRepeat)));
}
static RefPtr<CSSValue> valueForNinePieceImage(CSSPropertyID propertyID, const NinePieceImage& image, const RenderStyle& style)
{
if (!image.hasImage())
return CSSValuePool::singleton().createIdentifierValue(CSSValueNone);
RefPtr<CSSValue> imageValue;
if (image.image())
imageValue = image.image()->cssValue();
// -webkit-border-image has a legacy behavior that makes fixed border slices also set the border widths.
const LengthBox& slices = image.borderSlices();
bool overridesBorderWidths = propertyID == CSSPropertyWebkitBorderImage && (slices.top().isFixed() || slices.right().isFixed() || slices.bottom().isFixed() || slices.left().isFixed());
if (overridesBorderWidths != image.overridesBorderWidths())
return nullptr;
auto imageSlices = valueForNinePieceImageSlice(image);
auto borderSlices = valueForNinePieceImageQuad(slices, style);
auto outset = valueForNinePieceImageQuad(image.outset(), style);
auto repeat = valueForNinePieceImageRepeat(image);
return createBorderImageValue(WTFMove(imageValue), WTFMove(imageSlices), WTFMove(borderSlices), WTFMove(outset), WTFMove(repeat));
}
inline static Ref<CSSPrimitiveValue> zoomAdjustedPixelValue(double value, const RenderStyle& style)
{
return CSSValuePool::singleton().createValue(adjustFloatForAbsoluteZoom(value, style), CSSUnitType::CSS_PX);
}
inline static Ref<CSSPrimitiveValue> zoomAdjustedNumberValue(double value, const RenderStyle& style)
{
return CSSValuePool::singleton().createValue(value / style.effectiveZoom(), CSSUnitType::CSS_NUMBER);
}
static Ref<CSSPrimitiveValue> zoomAdjustedPixelValueForLength(const Length& length, const RenderStyle& style)
{
if (length.isFixed())
return zoomAdjustedPixelValue(length.value(), style);
return CSSValuePool::singleton().createValue(length, style);
}
static Ref<CSSValue> valueForReflection(const StyleReflection* reflection, const RenderStyle& style)
{
if (!reflection)
return CSSValuePool::singleton().createIdentifierValue(CSSValueNone);
RefPtr<CSSPrimitiveValue> offset;
if (reflection->offset().isPercentOrCalculated())
offset = CSSValuePool::singleton().createValue(reflection->offset().percent(), CSSUnitType::CSS_PERCENTAGE);
else
offset = zoomAdjustedPixelValue(reflection->offset().value(), style);
RefPtr<CSSPrimitiveValue> direction;
switch (reflection->direction()) {
case ReflectionDirection::Below:
direction = CSSValuePool::singleton().createIdentifierValue(CSSValueBelow);
break;
case ReflectionDirection::Above:
direction = CSSValuePool::singleton().createIdentifierValue(CSSValueAbove);
break;
case ReflectionDirection::Left:
direction = CSSValuePool::singleton().createIdentifierValue(CSSValueLeft);
break;
case ReflectionDirection::Right:
direction = CSSValuePool::singleton().createIdentifierValue(CSSValueRight);
break;
}
return CSSReflectValue::create(direction.releaseNonNull(), offset.releaseNonNull(), valueForNinePieceImage(CSSPropertyWebkitBoxReflect, reflection->mask(), style));
}
static Ref<CSSValueList> createPositionListForLayer(CSSPropertyID propertyID, const FillLayer& layer, const RenderStyle& style)
{
auto list = CSSValueList::createSpaceSeparated();
if (layer.isBackgroundXOriginSet() && layer.backgroundXOrigin() != Edge::Left) {
ASSERT_UNUSED(propertyID, propertyID == CSSPropertyBackgroundPosition || propertyID == CSSPropertyMaskPosition || propertyID == CSSPropertyWebkitMaskPosition);
list->append(CSSValuePool::singleton().createValue(layer.backgroundXOrigin()));
}
list->append(zoomAdjustedPixelValueForLength(layer.xPosition(), style));
if (layer.isBackgroundYOriginSet() && layer.backgroundYOrigin() != Edge::Top) {
ASSERT(propertyID == CSSPropertyBackgroundPosition || propertyID == CSSPropertyMaskPosition || propertyID == CSSPropertyWebkitMaskPosition);
list->append(CSSValuePool::singleton().createValue(layer.backgroundYOrigin()));
}
list->append(zoomAdjustedPixelValueForLength(layer.yPosition(), style));
return list;
}
static Ref<CSSValue> createSingleAxisPositionValueForLayer(CSSPropertyID propertyID, const FillLayer& layer, const RenderStyle& style)
{
if (propertyID == CSSPropertyBackgroundPositionX || propertyID == CSSPropertyWebkitMaskPositionX) {
if (!layer.isBackgroundXOriginSet() || layer.backgroundXOrigin() == Edge::Left)
return zoomAdjustedPixelValueForLength(layer.xPosition(), style);
auto list = CSSValueList::createSpaceSeparated();
list->append(CSSValuePool::singleton().createValue(layer.backgroundXOrigin()));
list->append(zoomAdjustedPixelValueForLength(layer.xPosition(), style));
return list;
}
if (!layer.isBackgroundYOriginSet() || layer.backgroundYOrigin() == Edge::Top)
return zoomAdjustedPixelValueForLength(layer.yPosition(), style);
auto list = CSSValueList::createSpaceSeparated();
list->append(CSSValuePool::singleton().createValue(layer.backgroundYOrigin()));
list->append(zoomAdjustedPixelValueForLength(layer.yPosition(), style));
return list;
}
static Length getOffsetComputedLength(const RenderStyle& style, CSSPropertyID propertyID)
{
// If specified as a length, the corresponding absolute length; if specified as
// a percentage, the specified value; otherwise, 'auto'. Hence, we can just
// return the value in the style.
//
// See http://www.w3.org/TR/CSS21/cascade.html#computed-value
switch (propertyID) {
case CSSPropertyLeft:
return style.left();
case CSSPropertyRight:
return style.right();
case CSSPropertyTop:
return style.top();
case CSSPropertyBottom:
return style.bottom();
default:
ASSERT_NOT_REACHED();
}
return { };
}
static LayoutUnit getOffsetUsedStyleRelative(RenderBox& box, CSSPropertyID propertyID)
{
// For relatively positioned boxes, the offset is with respect to the top edges
// of the box itself. This ties together top/bottom and left/right to be
// opposites of each other.
//
// See http://www.w3.org/TR/CSS2/visuren.html#relative-positioning
//
// Specifically;
// Since boxes are not split or stretched as a result of 'left' or
// 'right', the used values are always: left = -right.
// and
// Since boxes are not split or stretched as a result of 'top' or
// 'bottom', the used values are always: top = -bottom.
switch (propertyID) {
case CSSPropertyTop:
return box.relativePositionOffset().height();
case CSSPropertyBottom:
return -(box.relativePositionOffset().height());
case CSSPropertyLeft:
return box.relativePositionOffset().width();
case CSSPropertyRight:
return -(box.relativePositionOffset().width());
default:
ASSERT_NOT_REACHED();
}
return 0;
}
static LayoutUnit getOffsetUsedStyleOutOfFlowPositioned(RenderBlock& container, RenderBox& box, CSSPropertyID propertyID)
{
// For out-of-flow positioned boxes, the offset is how far an box's margin
// edge is offset below the edge of the box's containing block.
// See http://www.w3.org/TR/CSS2/visuren.html#position-props
// Margins are included in offsetTop/offsetLeft so we need to remove them here.
switch (propertyID) {
case CSSPropertyTop:
return box.offsetTop() - box.marginTop();
case CSSPropertyBottom:
return container.clientHeight() - (box.offsetTop() + box.offsetHeight()) - box.marginBottom();
case CSSPropertyLeft:
return box.offsetLeft() - box.marginLeft();
case CSSPropertyRight:
return container.clientWidth() - (box.offsetLeft() + box.offsetWidth()) - box.marginRight();
default:
ASSERT_NOT_REACHED();
}
return 0;
}
static RefPtr<CSSValue> positionOffsetValue(const RenderStyle& style, CSSPropertyID propertyID, RenderObject* renderer)
{
auto offset = getOffsetComputedLength(style, propertyID);
// If the element is not displayed; return the "computed value".
if (!renderer || !renderer->isBox())
return zoomAdjustedPixelValueForLength(offset, style);
auto& box = downcast<RenderBox>(*renderer);
auto* containingBlock = box.containingBlock();
// Resolve a "computed value" percentage if the element is positioned.
if (containingBlock && offset.isPercentOrCalculated() && box.isPositioned()) {
bool isVerticalProperty;
if (propertyID == CSSPropertyTop || propertyID == CSSPropertyBottom)
isVerticalProperty = true;
else {
ASSERT(propertyID == CSSPropertyLeft || propertyID == CSSPropertyRight);
isVerticalProperty = false;
}
LayoutUnit containingBlockSize;
if (box.isStickilyPositioned()) {
auto& enclosingClippingBox = box.enclosingClippingBoxForStickyPosition().first;
if (isVerticalProperty == enclosingClippingBox.isHorizontalWritingMode())
containingBlockSize = enclosingClippingBox.contentLogicalHeight();
else
containingBlockSize = enclosingClippingBox.contentLogicalWidth();
} else {
if (isVerticalProperty == containingBlock->isHorizontalWritingMode()) {
containingBlockSize = box.isOutOfFlowPositioned()
? box.containingBlockLogicalHeightForPositioned(*containingBlock, false)
: box.containingBlockLogicalHeightForContent(ExcludeMarginBorderPadding);
} else {
containingBlockSize = box.isOutOfFlowPositioned()
? box.containingBlockLogicalWidthForPositioned(*containingBlock, nullptr, false)
: box.containingBlockLogicalWidthForContent();
}
}
return zoomAdjustedPixelValue(floatValueForLength(offset, containingBlockSize), style);
}
// Return a "computed value" length.
if (!offset.isAuto())
return zoomAdjustedPixelValueForLength(offset, style);
// The property won't be overconstrained if its computed value is "auto", so the "used value" can be returned.
if (box.isRelativelyPositioned())
return zoomAdjustedPixelValue(getOffsetUsedStyleRelative(box, propertyID), style);
if (containingBlock && box.isOutOfFlowPositioned())
return zoomAdjustedPixelValue(getOffsetUsedStyleOutOfFlowPositioned(*containingBlock, box, propertyID), style);
return CSSValuePool::singleton().createIdentifierValue(CSSValueAuto);
}
Ref<CSSPrimitiveValue> ComputedStyleExtractor::currentColorOrValidColor(const RenderStyle* style, const Color& color) const
{
// This function does NOT look at visited information, so that computed style doesn't expose that.
if (!color.isValid())
return CSSValuePool::singleton().createColorValue(style->color());
return CSSValuePool::singleton().createColorValue(color);
}
static Ref<CSSPrimitiveValue> percentageOrZoomAdjustedValue(Length length, const RenderStyle& style)
{
if (length.isPercent())
return CSSValuePool::singleton().createValue(length.percent(), CSSUnitType::CSS_PERCENTAGE);
return zoomAdjustedPixelValueForLength(length, style);
}
static Ref<CSSPrimitiveValue> autoOrZoomAdjustedValue(Length length, const RenderStyle& style)
{
if (length.isAuto())
return CSSValuePool::singleton().createIdentifierValue(CSSValueAuto);
return zoomAdjustedPixelValueForLength(length, style);
}
static Ref<CSSValueList> borderRadiusCornerValues(const LengthSize& radius, const RenderStyle& style)
{
auto list = CSSValueList::createSpaceSeparated();
list->append(percentageOrZoomAdjustedValue(radius.width, style));
list->append(percentageOrZoomAdjustedValue(radius.height, style));
return list;
}
static Ref<CSSValue> valueForQuotes(const QuotesData* quotes)
{
if (!quotes)
return CSSValuePool::singleton().createIdentifierValue(CSSValueAuto);
unsigned size = quotes->size();
if (!size)
return CSSValuePool::singleton().createIdentifierValue(CSSValueNone);
auto list = CSSValueList::createSpaceSeparated();
for (unsigned i = 0; i < size; ++i) {
list->append(CSSValuePool::singleton().createValue(quotes->openQuote(i), CSSUnitType::CSS_STRING));
list->append(CSSValuePool::singleton().createValue(quotes->closeQuote(i), CSSUnitType::CSS_STRING));
}
return list;
}
static Ref<CSSValue> borderRadiusCornerValue(const LengthSize& radius, const RenderStyle& style)
{
if (radius.width == radius.height)
return percentageOrZoomAdjustedValue(radius.width, style);
return borderRadiusCornerValues(radius, style);
}
static Ref<CSSValueList> borderRadiusShorthandValue(const RenderStyle& style)
{
auto list = CSSValueList::createSlashSeparated();
bool showHorizontalBottomLeft = style.borderTopRightRadius().width != style.borderBottomLeftRadius().width;
bool showHorizontalBottomRight = showHorizontalBottomLeft || (style.borderBottomRightRadius().width != style.borderTopLeftRadius().width);
bool showHorizontalTopRight = showHorizontalBottomRight || (style.borderTopRightRadius().width != style.borderTopLeftRadius().width);
bool showVerticalBottomLeft = style.borderTopRightRadius().height != style.borderBottomLeftRadius().height;
bool showVerticalBottomRight = showVerticalBottomLeft || (style.borderBottomRightRadius().height != style.borderTopLeftRadius().height);
bool showVerticalTopRight = showVerticalBottomRight || (style.borderTopRightRadius().height != style.borderTopLeftRadius().height);
auto topLeftRadius = borderRadiusCornerValues(style.borderTopLeftRadius(), style);
auto topRightRadius = borderRadiusCornerValues(style.borderTopRightRadius(), style);
auto bottomRightRadius = borderRadiusCornerValues(style.borderBottomRightRadius(), style);
auto bottomLeftRadius = borderRadiusCornerValues(style.borderBottomLeftRadius(), style);
auto horizontalRadii = CSSValueList::createSpaceSeparated();
horizontalRadii->append(*topLeftRadius->item(0));
if (showHorizontalTopRight)
horizontalRadii->append(*topRightRadius->item(0));
if (showHorizontalBottomRight)
horizontalRadii->append(*bottomRightRadius->item(0));
if (showHorizontalBottomLeft)
horizontalRadii->append(*bottomLeftRadius->item(0));
list->append(WTFMove(horizontalRadii));
auto verticalRadiiList = CSSValueList::createSpaceSeparated();
verticalRadiiList->append(*topLeftRadius->item(1));
if (showVerticalTopRight)
verticalRadiiList->append(*topRightRadius->item(1));
if (showVerticalBottomRight)
verticalRadiiList->append(*bottomRightRadius->item(1));
if (showVerticalBottomLeft)
verticalRadiiList->append(*bottomLeftRadius->item(1));
if (!verticalRadiiList->equals(downcast<CSSValueList>(*list->item(0))))
list->append(WTFMove(verticalRadiiList));
return list;
}
static LayoutRect sizingBox(RenderObject& renderer)
{
if (!is<RenderBox>(renderer))
return LayoutRect();
auto& box = downcast<RenderBox>(renderer);
return box.style().boxSizing() == BoxSizing::BorderBox ? box.borderBoxRect() : box.computedCSSContentBoxRect();
}
static Ref<CSSFunctionValue> matrixTransformValue(const TransformationMatrix& transform, const RenderStyle& style)
{
RefPtr<CSSFunctionValue> transformValue;
auto& cssValuePool = CSSValuePool::singleton();
if (transform.isAffine()) {
transformValue = CSSFunctionValue::create(CSSValueMatrix);
transformValue->append(cssValuePool.createValue(transform.a(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.b(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.c(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.d(), CSSUnitType::CSS_NUMBER));
transformValue->append(zoomAdjustedNumberValue(transform.e(), style));
transformValue->append(zoomAdjustedNumberValue(transform.f(), style));
} else {
transformValue = CSSFunctionValue::create(CSSValueMatrix3d);
transformValue->append(cssValuePool.createValue(transform.m11(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m12(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m13(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m14(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m21(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m22(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m23(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m24(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m31(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m32(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m33(), CSSUnitType::CSS_NUMBER));
transformValue->append(cssValuePool.createValue(transform.m34(), CSSUnitType::CSS_NUMBER));
transformValue->append(zoomAdjustedNumberValue(transform.m41(), style));
transformValue->append(zoomAdjustedNumberValue(transform.m42(), style));
transformValue->append(zoomAdjustedNumberValue(transform.m43(), style));
transformValue->append(cssValuePool.createValue(transform.m44(), CSSUnitType::CSS_NUMBER));
}
return transformValue.releaseNonNull();
}
static bool rendererCanBeTransformed(RenderObject* renderer)
{
// Inline renderers do not support transforms.
return renderer && !is<RenderInline>(*renderer);
}
static Ref<CSSValue> computedTransform(RenderElement* renderer, const RenderStyle& style)
{
if (!rendererCanBeTransformed(renderer) || !style.hasTransform())
return CSSValuePool::singleton().createIdentifierValue(CSSValueNone);
TransformationMatrix transform;
style.applyTransform(transform, renderer->transformReferenceBoxRect(style), { });
// Note that this does not flatten to an affine transform if ENABLE(3D_TRANSFORMS) is off, by design.
// FIXME: Need to print out individual functions (https://bugs.webkit.org/show_bug.cgi?id=23924)
auto list = CSSValueList::createSpaceSeparated();
list->append(matrixTransformValue(transform, style));
return list;
}
// https://drafts.csswg.org/css-transforms-2/#propdef-translate
// Computed value: the keyword none or a pair of computed <length-percentage> values and an absolute length
static Ref<CSSValue> computedTranslate(RenderObject* renderer, const RenderStyle& style)
{
auto* translate = style.translate();
if (!translate || !rendererCanBeTransformed(renderer) || translate->isIdentity())
return CSSValuePool::singleton().createIdentifierValue(CSSValueNone);
auto list = CSSValueList::createSpaceSeparated();
list->append(zoomAdjustedPixelValueForLength(translate->x(), style));
if (!translate->y().isZero() || !translate->z().isZero())
list->append(zoomAdjustedPixelValueForLength(translate->y(), style));
if (!translate->z().isZero())
list->append(zoomAdjustedPixelValueForLength(translate->z(), style));
return list;
}
static Ref<CSSValue> computedScale(RenderObject* renderer, const RenderStyle& style)
{
auto* scale = style.scale();
auto& cssValuePool = CSSValuePool::singleton();
if (!scale || !rendererCanBeTransformed(renderer) || scale->isIdentity())
return cssValuePool.createIdentifierValue(CSSValueNone);
auto list = CSSValueList::createSpaceSeparated();
list->append(cssValuePool.createValue(scale->x(), CSSUnitType::CSS_NUMBER));
if (scale->z() != 1) {
list->append(cssValuePool.createValue(scale->y(), CSSUnitType::CSS_NUMBER));
list->append(cssValuePool.createValue(scale->z(), CSSUnitType::CSS_NUMBER));
} else if (scale->x() != scale->y())
list->append(cssValuePool.createValue(scale->y(), CSSUnitType::CSS_NUMBER));
return list;
}
static Ref<CSSValue> computedRotate(RenderObject* renderer, const RenderStyle& style)
{
auto* rotate = style.rotate();
auto& cssValuePool = CSSValuePool::singleton();
if (!rotate || !rendererCanBeTransformed(renderer) || rotate->isIdentity())
return cssValuePool.createIdentifierValue(CSSValueNone);
if (!rotate->is3DOperation() || (!rotate->x() && !rotate->y() && rotate->z()))
return cssValuePool.createValue(rotate->angle(), CSSUnitType::CSS_DEG);
auto list = CSSValueList::createSpaceSeparated();
if (rotate->x() && !rotate->y() && !rotate->z())
list->append(cssValuePool.createIdentifierValue(CSSValueX));
else if (!rotate->x() && rotate->y() && !rotate->z())
list->append(cssValuePool.createIdentifierValue(CSSValueY));
else {
list->append(cssValuePool.createValue(rotate->x(), CSSUnitType::CSS_NUMBER));
list->append(cssValuePool.createValue(rotate->y(), CSSUnitType::CSS_NUMBER));
list->append(cssValuePool.createValue(rotate->z(), CSSUnitType::CSS_NUMBER));
}
list->append(cssValuePool.createValue(rotate->angle(), CSSUnitType::CSS_DEG));
return list;
}
static inline Ref<CSSPrimitiveValue> adjustLengthForZoom(double length, const RenderStyle& style, AdjustPixelValuesForComputedStyle adjust)
{
return adjust == AdjustPixelValues ? zoomAdjustedPixelValue(length, style) : CSSValuePool::singleton().createValue(length, CSSUnitType::CSS_PX);
}
static inline Ref<CSSPrimitiveValue> adjustLengthForZoom(const Length& length, const RenderStyle& style, AdjustPixelValuesForComputedStyle adjust)
{
return adjust == AdjustPixelValues ? zoomAdjustedPixelValue(length.value(), style) : CSSValuePool::singleton().createValue(length);
}
Ref<CSSValue> ComputedStyleExtractor::valueForShadow(const ShadowData* shadow, CSSPropertyID propertyID, const RenderStyle& style, AdjustPixelValuesForComputedStyle adjust)
{
auto& cssValuePool = CSSValuePool::singleton();
if (!shadow)
return cssValuePool.createIdentifierValue(CSSValueNone);
auto list = CSSValueList::createCommaSeparated();
for (const ShadowData* currShadowData = shadow; currShadowData; currShadowData = currShadowData->next()) {
auto x = adjustLengthForZoom(currShadowData->x(), style, adjust);
auto y = adjustLengthForZoom(currShadowData->y(), style, adjust);
auto blur = adjustLengthForZoom(currShadowData->radius(), style, adjust);
auto spread = propertyID == CSSPropertyTextShadow ? RefPtr<CSSPrimitiveValue>() : adjustLengthForZoom(currShadowData->spread(), style, adjust);
auto style = propertyID == CSSPropertyTextShadow || currShadowData->style() == ShadowStyle::Normal ? RefPtr<CSSPrimitiveValue>() : cssValuePool.createIdentifierValue(CSSValueInset);
auto color = cssValuePool.createColorValue(currShadowData->color());
list->prepend(CSSShadowValue::create(WTFMove(x), WTFMove(y), WTFMove(blur), WTFMove(spread), WTFMove(style), WTFMove(color)));
}
return list;
}
Ref<CSSValue> ComputedStyleExtractor::valueForFilter(const RenderStyle& style, const FilterOperations& filterOperations, AdjustPixelValuesForComputedStyle adjust)
{
auto& cssValuePool = CSSValuePool::singleton();
if (filterOperations.operations().isEmpty())
return cssValuePool.createIdentifierValue(CSSValueNone);
auto list = CSSValueList::createSpaceSeparated();
Vector<RefPtr<FilterOperation>>::const_iterator end = filterOperations.operations().end();
for (Vector<RefPtr<FilterOperation>>::const_iterator it = filterOperations.operations().begin(); it != end; ++it) {
FilterOperation& filterOperation = **it;
if (filterOperation.type() == FilterOperation::REFERENCE) {
ReferenceFilterOperation& referenceOperation = downcast<ReferenceFilterOperation>(filterOperation);
list->append(cssValuePool.createValue(referenceOperation.url(), CSSUnitType::CSS_URI));
} else {
RefPtr<CSSFunctionValue> filterValue;
switch (filterOperation.type()) {
case FilterOperation::GRAYSCALE: {
filterValue = CSSFunctionValue::create(CSSValueGrayscale);
filterValue->append(cssValuePool.createValue(downcast<BasicColorMatrixFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_NUMBER));
break;
}
case FilterOperation::SEPIA: {
filterValue = CSSFunctionValue::create(CSSValueSepia);
filterValue->append(cssValuePool.createValue(downcast<BasicColorMatrixFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_NUMBER));
break;
}
case FilterOperation::SATURATE: {
filterValue = CSSFunctionValue::create(CSSValueSaturate);
filterValue->append(cssValuePool.createValue(downcast<BasicColorMatrixFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_NUMBER));
break;
}
case FilterOperation::HUE_ROTATE: {
filterValue = CSSFunctionValue::create(CSSValueHueRotate);
filterValue->append(cssValuePool.createValue(downcast<BasicColorMatrixFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_DEG));
break;
}
case FilterOperation::INVERT: {
filterValue = CSSFunctionValue::create(CSSValueInvert);
filterValue->append(cssValuePool.createValue(downcast<BasicComponentTransferFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_NUMBER));
break;
}
case FilterOperation::APPLE_INVERT_LIGHTNESS: {
filterValue = CSSFunctionValue::create(CSSValueAppleInvertLightness);
break;
}
case FilterOperation::OPACITY: {
filterValue = CSSFunctionValue::create(CSSValueOpacity);
filterValue->append(cssValuePool.createValue(downcast<BasicComponentTransferFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_NUMBER));
break;
}
case FilterOperation::BRIGHTNESS: {
filterValue = CSSFunctionValue::create(CSSValueBrightness);
filterValue->append(cssValuePool.createValue(downcast<BasicComponentTransferFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_NUMBER));
break;
}
case FilterOperation::CONTRAST: {
filterValue = CSSFunctionValue::create(CSSValueContrast);
filterValue->append(cssValuePool.createValue(downcast<BasicComponentTransferFilterOperation>(filterOperation).amount(), CSSUnitType::CSS_NUMBER));
break;
}
case FilterOperation::BLUR: {
filterValue = CSSFunctionValue::create(CSSValueBlur);
filterValue->append(adjustLengthForZoom(downcast<BlurFilterOperation>(filterOperation).stdDeviation(), style, adjust));
break;
}
case FilterOperation::DROP_SHADOW: {
DropShadowFilterOperation& dropShadowOperation = downcast<DropShadowFilterOperation>(filterOperation);
filterValue = CSSFunctionValue::create(CSSValueDropShadow);
// We want our computed style to look like that of a text shadow (has neither spread nor inset style).
ShadowData shadowData = ShadowData({ Length(dropShadowOperation.location().x(), LengthType::Fixed), Length(dropShadowOperation.location().y(), LengthType::Fixed) }, Length(dropShadowOperation.stdDeviation(), LengthType::Fixed), Length(0, LengthType::Fixed), ShadowStyle::Normal, false, dropShadowOperation.color());
filterValue->append(valueForShadow(&shadowData, CSSPropertyTextShadow, style, adjust));
break;
}
default:
ASSERT_NOT_REACHED();
filterValue = CSSFunctionValue::create(CSSValueInvalid);
break;
}
list->append(filterValue.releaseNonNull());
}
}
return list;
}
static Ref<CSSValue> specifiedValueForGridTrackBreadth(const GridLength& trackBreadth, const RenderStyle& style)
{
if (!trackBreadth.isLength())
return CSSValuePool::singleton().createValue(trackBreadth.flex(), CSSUnitType::CSS_FR);
const Length& trackBreadthLength = trackBreadth.length();
if (trackBreadthLength.isAuto())
return CSSValuePool::singleton().createIdentifierValue(CSSValueAuto);
return zoomAdjustedPixelValueForLength(trackBreadthLength, style);
}
static Ref<CSSValue> specifiedValueForGridTrackSize(const GridTrackSize& trackSize, const RenderStyle& style)
{
switch (trackSize.type()) {
case LengthTrackSizing:
return specifiedValueForGridTrackBreadth(trackSize.minTrackBreadth(), style);
case FitContentTrackSizing: {
auto fitContentTrackSize = CSSFunctionValue::create(CSSValueFitContent);
fitContentTrackSize->append(zoomAdjustedPixelValueForLength(trackSize.fitContentTrackBreadth().length(), style));
return fitContentTrackSize;
}
default:
ASSERT(trackSize.type() == MinMaxTrackSizing);
if (trackSize.minTrackBreadth().isAuto() && trackSize.maxTrackBreadth().isFlex())
return CSSValuePool::singleton().createValue(trackSize.maxTrackBreadth().flex(), CSSUnitType::CSS_FR);
auto minMaxTrackBreadths = CSSFunctionValue::create(CSSValueMinmax);
minMaxTrackBreadths->append(specifiedValueForGridTrackBreadth(trackSize.minTrackBreadth(), style));
minMaxTrackBreadths->append(specifiedValueForGridTrackBreadth(trackSize.maxTrackBreadth(), style));
return minMaxTrackBreadths;
}
}
class OrderedNamedLinesCollector {
WTF_MAKE_NONCOPYABLE(OrderedNamedLinesCollector);
public:
OrderedNamedLinesCollector(const RenderStyle& style, bool isRowAxis)
: m_orderedNamedGridLines(isRowAxis ? style.orderedNamedGridColumnLines() : style.orderedNamedGridRowLines())
, m_orderedNamedAutoRepeatGridLines(isRowAxis ? style.autoRepeatOrderedNamedGridColumnLines() : style.autoRepeatOrderedNamedGridRowLines())
{
}
virtual ~OrderedNamedLinesCollector() = default;
bool isEmpty() const { return m_orderedNamedGridLines.isEmpty() && m_orderedNamedAutoRepeatGridLines.isEmpty(); }
virtual void collectLineNamesForIndex(CSSGridLineNamesValue&, unsigned index) const = 0;
virtual int namedGridLineCount() const { return m_orderedNamedGridLines.size(); }
protected:
enum NamedLinesType { NamedLines, AutoRepeatNamedLines };
void appendLines(CSSGridLineNamesValue&, unsigned index, NamedLinesType) const;
const OrderedNamedGridLinesMap& m_orderedNamedGridLines;
const OrderedNamedGridLinesMap& m_orderedNamedAutoRepeatGridLines;
};
class OrderedNamedLinesCollectorInGridLayout : public OrderedNamedLinesCollector {
public:
OrderedNamedLinesCollectorInGridLayout(const RenderStyle& style, bool isRowAxis, unsigned autoRepeatTracksCount, unsigned autoRepeatTrackListLength)
: OrderedNamedLinesCollector(style, isRowAxis)
, m_insertionPoint(isRowAxis ? style.gridAutoRepeatColumnsInsertionPoint() : style.gridAutoRepeatRowsInsertionPoint())
, m_autoRepeatTotalTracks(autoRepeatTracksCount)
, m_autoRepeatTrackListLength(autoRepeatTrackListLength)
{
}
void collectLineNamesForIndex(CSSGridLineNamesValue&, unsigned index) const override;
private:
unsigned m_insertionPoint;
unsigned m_autoRepeatTotalTracks;
unsigned m_autoRepeatTrackListLength;
};
class OrderedNamedLinesCollectorInSubgridLayout : public OrderedNamedLinesCollector {
public:
OrderedNamedLinesCollectorInSubgridLayout(const RenderStyle& style, bool isRowAxis, unsigned totalTracksCount)
: OrderedNamedLinesCollector(style, isRowAxis)
, m_insertionPoint(isRowAxis ? style.gridAutoRepeatColumnsInsertionPoint() : style.gridAutoRepeatRowsInsertionPoint())
, m_autoRepeatLineSetListLength((isRowAxis ? style.autoRepeatOrderedNamedGridColumnLines() : style.autoRepeatOrderedNamedGridRowLines()).size())
, m_totalLines(totalTracksCount + 1)
{
if (!m_autoRepeatLineSetListLength) {
m_autoRepeatTotalLineSets = 0;
return;
}
unsigned named = (isRowAxis ? style.orderedNamedGridColumnLines() : style.orderedNamedGridRowLines()).size();
if (named >= m_totalLines) {
m_autoRepeatTotalLineSets = 0;
return;
}
m_autoRepeatTotalLineSets = (m_totalLines - named) / m_autoRepeatLineSetListLength;
m_autoRepeatTotalLineSets *= m_autoRepeatLineSetListLength;
}
void collectLineNamesForIndex(CSSGridLineNamesValue&, unsigned index) const override;
int namedGridLineCount() const override { return m_totalLines; }
private:
unsigned m_insertionPoint;
unsigned m_autoRepeatTotalLineSets;
unsigned m_autoRepeatLineSetListLength;
unsigned m_totalLines;
};
void OrderedNamedLinesCollector::appendLines(CSSGridLineNamesValue& lineNamesValue, unsigned index, NamedLinesType type) const
{
auto iter = type == NamedLines ? m_orderedNamedGridLines.find(index) : m_orderedNamedAutoRepeatGridLines.find(index);
auto endIter = type == NamedLines ? m_orderedNamedGridLines.end() : m_orderedNamedAutoRepeatGridLines.end();
if (iter == endIter)
return;
auto& cssValuePool = CSSValuePool::singleton();
for (const auto& lineName : iter->value)
lineNamesValue.append(cssValuePool.createCustomIdent(lineName));
}
void OrderedNamedLinesCollectorInGridLayout::collectLineNamesForIndex(CSSGridLineNamesValue& lineNamesValue, unsigned i) const
{
ASSERT(!isEmpty());
if (!m_autoRepeatTrackListLength || i < m_insertionPoint) {
appendLines(lineNamesValue, i, NamedLines);
return;
}
ASSERT(m_autoRepeatTotalTracks);
if (i > m_insertionPoint + m_autoRepeatTotalTracks) {
appendLines(lineNamesValue, i - (m_autoRepeatTotalTracks - 1), NamedLines);
return;
}
if (i == m_insertionPoint) {
appendLines(lineNamesValue, i, NamedLines);
appendLines(lineNamesValue, 0, AutoRepeatNamedLines);
return;
}
if (i == m_insertionPoint + m_autoRepeatTotalTracks) {
appendLines(lineNamesValue, m_autoRepeatTrackListLength, AutoRepeatNamedLines);
appendLines(lineNamesValue, m_insertionPoint + 1, NamedLines);
return;
}
unsigned autoRepeatIndexInFirstRepetition = (i - m_insertionPoint) % m_autoRepeatTrackListLength;
if (!autoRepeatIndexInFirstRepetition && i > m_insertionPoint)
appendLines(lineNamesValue, m_autoRepeatTrackListLength, AutoRepeatNamedLines);
appendLines(lineNamesValue, autoRepeatIndexInFirstRepetition, AutoRepeatNamedLines);
}
void OrderedNamedLinesCollectorInSubgridLayout::collectLineNamesForIndex(CSSGridLineNamesValue& lineNamesValue, unsigned i) const
{
if (!m_autoRepeatLineSetListLength || i < m_insertionPoint) {
appendLines(lineNamesValue, i, NamedLines);
return;
}
if (i >= m_insertionPoint + m_autoRepeatTotalLineSets) {
appendLines(lineNamesValue, i - m_autoRepeatTotalLineSets, NamedLines);
return;
}
unsigned autoRepeatIndexInFirstRepetition = (i - m_insertionPoint) % m_autoRepeatLineSetListLength;
appendLines(lineNamesValue, autoRepeatIndexInFirstRepetition, AutoRepeatNamedLines);
}
static void addValuesForNamedGridLinesAtIndex(OrderedNamedLinesCollector& collector, unsigned i, CSSValueList& list, bool renderEmpty = false)
{
if (collector.isEmpty() && !renderEmpty)
return;
auto lineNames = CSSGridLineNamesValue::create();
collector.collectLineNamesForIndex(lineNames.get(), i);
if (lineNames->length() || renderEmpty)
list.append(WTFMove(lineNames));
}
static Ref<CSSValueList> valueForGridTrackSizeList(GridTrackSizingDirection direction, const RenderStyle& style)
{
auto& autoTrackSizes = direction == ForColumns ? style.gridAutoColumns() : style.gridAutoRows();
auto list = CSSValueList::createSpaceSeparated();
for (auto& trackSize : autoTrackSizes)
list->append(specifiedValueForGridTrackSize(trackSize, style));
return list;
}